Terra MODIS band 2 electronic crosstalk: cause, impact, and mitigation

J. Sun; X. Xiong; N. Che; A. Angal

doi:10.1117/12.864738

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13 October 2010 Terra MODIS band 2 electronic crosstalk: cause, impact, and mitigation

J. Sun, X. Xiong, N. Che, A. Angal

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Proceedings Volume 7826, Sensors, Systems, and Next-Generation Satellites XIV; 78261Y (2010) https://doi.org/10.1117/12.864738
Event: SPIE Remote Sensing, 2010, Toulouse, France

Abstract

The MODerate-resolution Imaging Spectroradiometer (MODIS) is one of the primary instruments in the Earth Observing System (EOS). The first MODIS instrument was launched in December, 1999 on-board the NASA EOS Terra spacecraft. MODIS has 36 bands, covering a wavelength range from 0.4 μm to 14.4 μm. MODIS collects data at three spatial resolutions: 0.25 km (2 bands), 0.5 km (5 bands), and 1 km (29 bands). In the Earth scene images of Terra MODIS band 2 (0.85μm), two sets of regularly distributed anomalous pixels are observed in each scan, of which one is brighter and the other is darker than surrounding pixels. MODIS band 2 is a 0.25 km resolution band, having 40 detectors and 4 subframes for each detector. The brighter dots correspond to the subframe 1 pixels of detector 30 and the darker dots correspond to the same subframe of detector 29. In this manuscript, it is demonstrated that the anomaly is due to electronic crosstalk. The sending bands and detectors for the crosstalk are identified using lunar images and are confirmed using the Spectroradiometric Calibration Assembly (SRCA) observations. A linear algorithm is developed to describe the crosstalk, and crosstalk coefficients are derived using lunar observations. With the derived coefficients, the dotted features in Earth view images of Terra band 2 can be significantly reduced.

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J. Sun, X. Xiong, N. Che, and A. Angal "Terra MODIS band 2 electronic crosstalk: cause, impact, and mitigation", Proc. SPIE 7826, Sensors, Systems, and Next-Generation Satellites XIV, 78261Y (13 October 2010); https://doi.org/10.1117/12.864738

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